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CVE-2022-40617

Published: 3 October 2022

strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
strongswan
Launchpad, Ubuntu, Debian
bionic
Released (5.6.2-1ubuntu2.9)
focal
Released (5.8.2-1ubuntu3.5)
jammy
Released (5.9.5-2ubuntu2.1)
kinetic
Released (5.9.6-1ubuntu2)
lunar
Released (5.9.6-1ubuntu2)
mantic
Released (5.9.6-1ubuntu2)
trusty
Released (5.1.2-0ubuntu2.11+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (5.3.5-1ubuntu3.8+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H